Remember I said he is in the attic? Well he has his own room air conditioner.
Iguanas don't naturally hibernate, but as seen in Florida, when it gets cold they do go in a hibernating state.
When I leave on vacation, I turn him down to @68 degrees. Then he has his corner with newspaper to potty on, and someone comes in every other day to change his food just in case he gets hungry.
Iguanas can go a long time without eating.
I'll probably get yelled at for this, but as a last ditch effort, I suggest turning down his temp for a week or two. He will be easier to deal with, and will have time to realise you're not going to hurt him.